#include<iostream>
#include<cmath>
using namespace std;
int main()
{
	int n; cin >> n;
	for (int i = n; i >= 0; i--)
	{
		int a; cin >> a;
		if (a == 0)continue;

		if (a < 0)cout << "-";
		else if (i != n) cout << "+";

		a = abs(a);
		if (a != 1 || a == 1 && i == 0)cout << a;

		if (i == 0)continue;
		else if (i == 1)cout << "x";
		else cout << "x^" << i;
		

	}
	return 0;
}
